My girl is the same way, itchy itchy tail. I come out to a grey butt from her rubbing it along the bars. Broken hairs at the top and mad frizzies.
She has had fecal count and it UTD on everything necessary.
Her tail is flakey towards the end and I have tried anywhere from a "good" conditioner to MTG and even coconut oil for moisturizing and it doesn't seem to help :-/
What's the deal with the original Listerine and baby oil mix?? Seen it mentioned a few times but not clearly for what exactly.